Microbiology of Soils
Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

ingestion of bacteria
all of these
ingestion of fungi
ingestion of mold

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Microbiology of Soils
Nitrogen oxidation (nitrification)refers to the

changing of atmospheric nitrogen (N2) to nitrogen compounds
conversion of ammonium ions into nitrates through the activities of certain bacteria.
sulfur is oxidized to the sulfate form through Thiobacillus bacteria
None of these

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Microbiology of Soils
Syntrophism involves

exchange of nutrients between two species
no exchange of nutrients between two species
exchange of nutrients among species
no exchange of nutrients among species

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